Patents by Inventor Ramalho Stive

Ramalho Stive has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11953032
    Abstract: A hydraulic pump or motor includes a mounting flange that is disposed at the first end of the housing. The mounting flange defines a pair of bolt receiving slots that are disposed along the X-axis on either side of the shaft. The pair of bolt receiving slots each define a radius center that are spaced away from each other a X dimension, and a pilot projection extends longitudinally away from the mounting flange, defining a pilot projection diameter. A ratio of the X dimension to the pilot projection diameter ranges from 1.1 to 1.5.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: April 9, 2024
    Assignee: Caterpillar Inc.
    Inventors: Justin Douglas Speichinger, Ramalho Stive, Darren Joseph Hopf, Aurelien Herve Bernard, Paul Alan Rousseau
  • Publication number: 20220252083
    Abstract: A female mounting member is configured to mate with a hydraulic pump or fan. The member includes a body that defines a projection receiving cavity defining a cavity diameter, and a first threaded hole defining a first threaded hole diameter. A ratio of the cavity diameter to the first threaded hole diameter ranges from 8.0 to 8.15.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 11, 2022
    Applicant: Caterpillar Inc.
    Inventors: Justin Douglas Speichinger, Ramalho Stive, Darren Joseph Hopf, Aurelien Herve Bernard, Paul Alan Rousseau
  • Publication number: 20220252087
    Abstract: A hydraulic pump or motor includes a mounting flange that is disposed at the first end of the housing. The mounting flange defines a pair of bolt receiving slots that are disposed along the X-axis on either side of the shaft. The pair of bolt receiving slots each define a radius center that are spaced away from each other a X dimension, and a pilot projection extends longitudinally away from the mounting flange, defining a pilot projection diameter. A ratio of the X dimension to the pilot projection diameter ranges from 1.1 to 1.5.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 11, 2022
    Applicant: Caterpillar Inc.
    Inventors: Justin Douglas Speichinger, Ramalho Stive, Darren Joseph Hopf, Aurelien Herve Bernard, Paul Alan Rousseau
  • Patent number: 10889965
    Abstract: A hydraulic circuit for a pair of cylinders of an articulation system includes a pump, a reservoir, a directional control valve (DCV), a pair of actuator valves (AVs) and an articulation charge circuit (ACC). The DCV is fluidly coupled to the pump, the reservoir and the pair of cylinders via a supply line, a fluid return line and a pair of cylinder supply lines (CSLs) respectively. Each CSL has a load check valve (LCV) therein. The AVs are fluidly coupled with the DCV and the pump via a pilot supply line (PSL) for actuating movement of the DCV. The ACC, associated with the PSL and each cylinder supply line downstream of the associated LCV, charges a corresponding CSL with fluid from the PSL for increasing a pressure in the corresponding CSL when the pressure in the corresponding CSL falls below the pressure of fluid associated with the PSL.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: January 12, 2021
    Assignee: Caterpillar Inc.
    Inventors: Travis Neale Richards, Ernest Everett Stoops, Michael Lemoyne Repscher, Matthew David Roley, Ramalho Stive, Michael Robert Kunde, Dwanz Mwalimu Mwasi, Charles Eric Nail, Bart Jerome Bradford
  • Publication number: 20200392702
    Abstract: A hydraulic circuit for a pair of cylinders of an articulation system includes a pump, a reservoir, a directional control valve (DCV), a pair of actuator valves (AVs) and an articulation charge circuit (ACC). The DCV is fluidly coupled to the pump, the reservoir and the pair of cylinders via a supply line, a fluid return line and a pair of cylinder supply lines (CSLs) respectively. Each CSL has a load check valve (LCV) therein. The AVs are fluidly coupled with the DCV and the pump via a pilot supply line (PSL) for actuating movement of the DCV. The ACC, associated with the PSL and each cylinder supply line downstream of the associated LCV, charges a corresponding CSL with fluid from the PSL for increasing a pressure in the corresponding CSL when the pressure in the corresponding CSL falls below the pressure of fluid associated with the PSL.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 17, 2020
    Applicant: Caterpillar Inc.
    Inventors: Travis Neale Richards, Ernest Everett Stoops, Michael Lemoyne Repscher, Matthew David Roley, Ramalho Stive, Michael Robert Kunde, Dwanz Mwalimu Mwasi, Charles Eric Nail, Bart Jerome Bradford